Beam splitting prism assembly

Details Beam splitting prism assembly Beam splitting prism assembly

1974-12-11

1976-01-13

Rubin, David H.

G02B 2710

Patent

active

039320278

ABSTRACT:
A four-element composite prism assembly for splitting an incident beam into three colour components, the first and second pairs of elements being separated by respective air gaps, and colour separation occurring at respective spectrally selective dichroic coatings between the second and third and the third and fourth prism elements respectively, the separated colour components being directed in different directions by total internal reflection at the air gaps. To achieve the optimum separation upper and lower limits are defined in the claims for the apex angles of the three prism elements.

REFERENCES:
patent: 3802763 (1974-04-01), Cook et al.

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